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If (A(t)=a+7t) and (A(4)=50), what is (a)?यदि (A(t)=a+7t) और (A(4)=50), तो (a) क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2222
Given \(A(t)=a+7t\). Substituting \(t=4\) gives \(A(4)=a+7(4)=a+28\). Since \(A(4)=50\), we get \(a+28=50\), so \(a=22\). Option 28 is the increase over 4 time units, not the initial value \(a\). Exam tip: Substitute the given value of \(t\) first, then solve the resulting linear equation.दिया है कि \(A(t)=a+7t\)। \(t=4\) रखने पर \(A(4)=a+7(4)=a+28\) होगा। चूँकि \(A(4)=50\), इसलिए \(a+28=50\), अतः \(a=22\)। विकल्प 28, \(4\) समय इकाइयों में हुई वृद्धि है, आरंभिक मान \(a\) नहीं। परीक्षा टिप: पहले दिए गए \(t\) का मान फलन में रखें, फिर प्राप्त रैखिक समीकरण हल करें।
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